Question

3/2căn20 - 2căn45 + căn125 + 10/căn5 - căn4/5

Answer 1

`3/2sqrt{20} - 2sqrt{45} + sqrt{125} + 10/sqrt5 - sqrt4/5`
`=3/2sqrt{4.5}-2sqrt{9.5}+sqrt{25.5}+(2.5)/sqrt5-2/5`
`=3sqrt5-6sqrt5+5sqrt5+2sqrt5-2/5`
`=4sqrt5-2/5`

Answer 2

3/2căn20 - 2căn45 + căn125 + 10/căn5 - căn4/5

\(3\sqrt{5}-6\sqrt{5}+5\sqrt{5}+10\sqrt{5}-\dfrac{2}{5}\sqrt{5}=\dfrac{58}{5}\sqrt{5}\)